Content refers to data stored in the ArcGIS Platform portal such as a map, layer, data service, style, tool, file, application, or notebook. Content structure is typically text, JSON, or a reference to a file or service. Content is secure and is accessed and managed with an item. It is also referred to as the collection of items that belongs to a user, group, or organization. Applications and APIs can search and filter content by item data fields, such as owner, group, organization, type, location, tags, date modified, and date created.